Two Bustling Ports Face Union Action

Two big West Coast maritime ports—in Oakland, Calif., and Portland, Ore.—are dealing with strikes or the threat of organized labor action ahead of the busy holiday season.

On Tuesday, striking workers of the Service Employees International Union disrupted shipping at the Port of Oakland. Meanwhile, a strike notice by the International Longshore and Warehouse Union has been posted for Portland's docks on Sunday, if progress in a...